Pond Lab Multi-Test kit comprises up to 200 tests combined of the 6 key parameters to test in your pond: ammonia, nitrite, nitrate, pH, GH and KH. All the tests are liquid drop tests from a dropper bottle to ensure the drops are the same size. Full instructions are included detailing optimum levels and suggestions for correction, along with an integrated test tube rack. All you have to do is add your pond water to the test tube and count the number of drops needed. The back of the box details clear pictorial instructions so you can see what to do from the start.